[1st verse:] I met Henry at a swell affair Mother heard he was a millionaire I told him that he may call some night He seemed pleased and then replied, "All right!" Sunday, Henry thought he'd look us up Dropped in while the folks were having sup Henry felt embarrassed for he thought I'd be alone So my mother called me over and said in a whispered tone: [Refrain:] Put out your little sister Millie Put out your little brother Willie Tell Aunt Marie to be going on her way Don't forget to say: "Call another day!" Put father wise to put out Molly Tell him to put her on a trolley You may have some fun, put out ev'ry one But don't put out the light [2nd verse:] Soon I had the parlor to myself Placed the lamp upon the mantelshelf Then he got as loving as could be Asked if I would sit upon his knee After spooning for an hour or more He said, "Dear, my eyes are getting sore Doctor said the light is detrimental to my eyes" Now I would have done it gladly had my mother not advised:
https://primoaccordo.net/irving-berlin/dont-put-out-the-light.htm